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Reproduced in build 060613. To the bug reproduce: - create LoanApplication Schema; - exit IDE; - set read-only file attribute to LoanApplication.xsd file; - run IDE; - open LoanApplication schema in Source; - type anything IDE hangs for a certain time and then throws out of memory exception: java.lang.OutOfMemoryError: Java heap space
this happens as we try to clear the undo queue which creates issues with r/o files (deletes beforesaveedit) we should check if we can undo/redo and then clear the queue.
Verified in build060719.